I've been messing with building a sentry also. I've found that all the micro controller options end up being really cr@ppy and useless. you need a computer to do image processing. micro controllers are only good for basic simple stuff. image processing is the opposite of basic and simple. i ended up going with the sentry project software because after almost a year of messing with the other options out there, everything else turned out to be useless when you actually try to use it for practical purposes.. like when you need it to actually engage targets accurately. it's easy to think that it's simple but it is far from simple.
